From the picture shown, I would suggest putting a drop of syrup in, after taking a lot of the straw out. The idea of the straw is to stop the bees drowning, not to hide it.
Put the drum upright and put a cover over it if it is at all likely to rain. Lengths of wood for the bees to climb out again would be helpful.
It's becoming too cold now in all probability and is at best a desperate measure.
If you have any empty supers, get yourself a washing bowl, with some straw in and sit it on the top bars. Bowl costs about £1.50, mass access to the bowl and it's private to the occupants of the hive, so no disease or robbing problems. It's certainly cheaper than an Ashforth and faster to produce, as long as you have empty supers to house them on top of your brood boxes.
Not my idea, just an observation!
Cheaper if you can find them at the pound shop instead of Morrisons (they are probably about sold out by now)
Use the 55 gallon drum for mixing your syrup if you haven't got Apivert or Ambrosia etc.